function fea = DLBP(img, radius, neighbors, k_ratio)
%% select k_ratio biggest feature vector
    h = param.local_func(img, radius, neighbors, 0, 'h');
    h = sort(h(:), 1, 'descend');
    h = h(1:k_ratio);
    if sum(h) == 0
        fea = h;
    else
        fea = h / sum(h);
    end
end